Apparatus for producing threaded pins



y F. w. HESSMER APPARATUS FOR... PRODUCING THREADED PINS Filed Dec. 22. 1924 3 Shoots-$hoot 1 F y. .1. 58 1 22 21 0 k$15 v 0 07 a v L25 z5 I 26 I ,26. H 61 2 a i 2? 69 0 Q 4 7 I v 5 050 6.5 7 9 74 7 9 6 i p I 11 re B0. 4 I

INVENTOR ATTORNEY.

Ma '31 1927. .7 3 F. w, HESSMER APPARATUS FOR PRODUCING THREADED Plus Filed Dec. 22, 1924 s Shoots-Shoot 2 LNVENTOR 'MM W1 May 31, 1927.

' 1,630,793 F. w. HESSMER APPARATUS FOR PRODUCING THREADED PINS Filed Dec. 22, 1924 3 Shoots-Sheet 3 INVENT R mmy Patented May 31, 1.927.

FREDERICK Q nnsslvrnn, or JERSEY CITY, JERSEY.

v memes; FQRZEBODUQINGTHREADED' Him 4 Application 'filed December 22, 1924. Serial No. 757,384.

' thread as perfectly and accurately as possible.

. It'is also an object of the invention to pro- 'vide means by which the points {of the threads can be made of slightlyconical form. It is a further object of'the invention-tov provide means by which the operation 'of v cutting the thread can be rendered as speedy as possible so as to reduce the cost of the production.

In the accompanying drawings Fig. 1 i a plan view of the machine illus trating the preferred form embodyingi ny invention,

Fig.2 is aside elevation, Fig. 3 is a front elevation, and Fig. '4 is'a sile view of the arm holding part of the regulating device and Figs. 5 and 5 are side and top views, respectively of the arm and of the regulatingdevice to. give the pins a pointed head. Fig. 6 is an i1lustratio1rof-oneof the threaded articles made according to my new i invention. I 30 Like numerals refer to like parts in. the

several figures.

In the drawings, 1 denotes a'bed plate provided on the supporting frameQ, the plate carrying a frame 3 upon which 'jou'rnals4 and "5 are secured, shaft 6 being movably arranged in said journals. In about the mid dle of main shaft 6 there is a lead screw 7 provided adjoining pulley 8;: the chuck 9f is provided at the free end of said shaft 6, the other end of same being movablyengaged by one ofthe finger-shaped pointsof a powerful spring 10. This spring presses against the center pointof shaft 6. whereas the other end of spring 10 is similarly held, in the same axis, in the upright arm 11.

' Upon frame 3 there is provided another" journal 12 having a fork-shaped terminal between the arms of which a cylindrical, block 13, having an upright arm 14 with a:

horizontal extension 15 whichhas as pivot the screws16 and 17. g aperture 18in which by screw 19 a stamp M '20 with a thread, answeringastopitch and other measurements screw 7, is secured, the" stamp 2.0 restin directly uponsaidithread 7.1

Arm 15is fur ermoreat its free end ex- The arm 15 has an tended into a hook .21 to hold a-weight 22 thereby.) i 7 Upon frain'e 3 therekis also mounteda 10111313123150 which at its upper end arm 124 is pivoted in such "way that the down wardly bent end is movably secured to said journal by meansof-the screw points as a pivot, while rod 26, which-at itsother-end ismovably laid through journal'27,is'rigidly i secured. to arm 24' by means of-screw 25''{S0 that t will follow all movements of arm 24.

The free end of ar-n 24 has the'shapeofthe letter V turned upside down, and is at its utmost end 'of a fo'r k shape', bet'vveenthe 70 arms of which a wheel '28Qis-movably arranged and held in position by means of pin, 29. This latter '-w-heel' is resting i upon the-highest pointof eccentric o'r'camwheel' secured to auxiliary shaft31mov .ably arranged in iour nals 32-and 3'3 and op er'at-e'd bypulley34. At the otherfend of shaft 31 there is a guide-Wheel 35 secured.

to it, about-one half ofits face-b'eing'broken away. I 1 q Y 80 This guide wh'eel35 presses a: ainst ailittle pulley 36 movably held by pin 3 withinitork 38 of shaft 39; mova'bly arrangedwit hin ou.rna ls 4'0 and 41. Furthermore there is-a standard 42 at the top of which by m'eans 5 of a screw a flatl'ever 43 is movably secured,

said'leve'r 43 having a slit 44 putover the upright pin 45 on-slia'ft 39.- At abont'its middle lever 43is'twi-st'ed '9O degrees andis provided with a hook 46 which isengaged by a powerful spring 4'7 held at itsoth'er 'end by ho'o'k' 48'attachedto bed plate I. At,

the end of the vertical part of lever 43 the same has anotherslit'49' (Fig-"3.) through. which a'rod 50 is passed. This rod 50 ;is

supported by all-shaped fraine 51' having in its upright arms 52 and 53 suitable openings through which therod' 50 is passing, being at the same time supportedby' same;the frame 51 in its turn is securedf to the structure by being rigidly connected to the'bent, brace 54held iniposition by strong screws upon journal '55 (Fig. 3) secured to bed plate 1. Between the. upright arms'f52'and 53 rod 50 is provided with the tyvoknobs .56 and 57 acertain-distance' from "e'ach'other. It is obvious from the dra-wings that rod 50 leads to and disappears within theflowest pointof box 58 representing a magazine held in anjincl'i'ned 'pos'itioiibythe plate59, hav- 1 "inga hole 59 secur.edtojournal 5'5 the arm 62 issecurecl to j'ournal 5.5and reaches into magaZineES to. regulate the feedingof the ins.

In the ilength sides of frame 3, in which the journals i and .5 are put in, there is a block 63 (see Fig. 4) which is providedwith a mold adaptedto receive a cylindricalbody. -The lowest; point "of this mold is on the same level with the lowest-point of rod as well.

as et the lowest pointof the'inside of box 5 8."]In' .tl1e. arm 2 lthereis a slot in which stamp 64: provided vwith a chasing cutter or thread 65,. is secured byscrew 66 to said larni-j24-g screws .67 til 161 68 preventing said die J pulley 73 on shaft- 7 l,lsame heing'actuated by "loose and fast pulley 75 -and 7 6, respectively; pulley534 'is actuated by. means of pulley 77 indicated onshaft'l'.

1 i. Finally there is arranged onplatform 1 a standard 78 the upper end of which serves a being iii-contact withthe cam-wheel 83 havo inga depression 84 upon shaft 81. The surface. of platform 80 is preferably parallel as apivot to abent arm? 9-with a platform 80at its end located below a-set screw 81 in garmQ lland a wheel 82 rotatably arranged within its fork-shaped end; the wheel 82 to thestraight partof the arm 24:, or its central axis if ofround; form,;in which set screw 81 .is secured. 1 a I The shifting of the'bel'tfrom loose pulley 75 to the fast pulley. 7 6, and vice versa, is

not shown as it is not necessaryto dwell upon suchvmatters familiar to men who know the art, likewise'lubricating devices are not indicated when their provlsion 1s a well un-;

.derstood I matter. I v ,-.I am going tod jofmy new invention which is preferably for 'cutting threadsupon round iron orysteel the pins-being of exactly thesame length.

,pinshavingone of their ends flattened out so as'to be of more or less prismatic shape I at thisend and being of slightly cone-shaped 7 form withrounded head at the other enchall Assuming that the machine in the moment {it is started to run is standing exactly as gseen-xinFig. 1, it is obvious from the above onto block 63.. a V p v.

Chuck 91has arecess of rectangularshape so that the prismatic end ofthe" pins'iwi ll' fit inand as soon as rod 50 'pushes'the pin onto block 63 it is ultimately entering chuck- 1 that the rod 50 during the continuation of the motion of guide wheel 35will push-the.

pin at the lowest-point of box 58 out 'o f same through the hole 59 overto and above field in; the bed plate between the escribe now the operation 9 and ret-ained while being pressed against said chuck by" rod 50. This is ef-, fected, as already alluded toabove,vbymeans of guide-'wheel'35. Part of the face of wheel 35being broken away, lever 4-3 is pushed outwardly when the. high points of the edge I of guide-wheel. 35 press against wheel 36' thus pushing shaft 39 with its 'pin i5 out- 'wardly which movement thelever-is forced to follow. The reverse is taking placewhen spring 47 contracts and presses. lever d3 against pin hi cat'1singshaft'39 with wheel '36 to press against and follow the edge of? gUlClG-WhGQl35 allover the ,recessedpart The effect of these forth and back motions is very important because any time lever 4.3

turns towards the magazine .58 it pushes the rod 50: all through the lowest partof said magazine 58 thereby pushing the pinadn'iit tedby regulating arm 62 nto the lowest part of said magazine, out of same and throu'glr H hole 59 onto block 63 where its prismatic head is caught and held by chucltgfl. The pin imn'iedi'atelyfollows the rotation of shaft Gand at'this moment arm Qtis also'lowered until th'e'stamp 6:11 with thechasingicutter ,65'at its lowest end reaches down upon the pin resting during its rotation upon block 63. As the heavyweight TQis acting upon air-11124; it is natural that the chasing cutter .65. of stamp 64 will cutla thread into the V The length and other details of this thread are regulated by" pin during its rotation.

two factors, to wit: the 'leadlscrew 7 in connection with the d1e20 sliding alongsaid thread andthe eccentric or edge cam 30 in connection with wheel 28 at theft-i cent end I of arm 24. In Figz'et stamp (3 with thread 65 is seen" lifted off block 631s wheel -28 is practically at the highest point of said edge cam 30, but from the form of this latu ter cam it is obvious that arm-'24 will lower in the further course of rotationaind "that;

it will cut a threadinto the pm as soon as said arm 2% is suliiciently lowered to bring stamp 64Ewith thread 65into contactflwith the pin.- .While this cutting action s per eccentric cain'iqO. Owingtolthe great difference in dian'ieter.between pulleys S and 34, both beingactuated by the same driving shaft 74, the chuck 9, holding the jiin'oii a considerable number of revolutions in the time the wheel 28 isfou't of contact with eccentricfcam whereby a thread almost up to the cone-shaped, somewhat. rounded head, of the pin s cut. I-irordertd givetheg pin a uniform thread which reduces/in width 'only closely at the cone-shaped end of :the pin a regulator ispro'vided which consists of the pivotally arrangedarm 7 9 with its plat- 7 formed wheelQS isout ofcontact with the block 63, makes during this cutting action i form 80 andthe wheel 82. The cam 83,

being ofsmall diameter and. having afd'enression'8 l5 is rigidly secured on shaft 31 and in operative engagement with the wheel 82 of arm 79. The set-screw 81 arranged in arm 24, operativelyengagessaid arm 79 at its'platform 80 and thus brings arms 24 and 79 in co-operative relation to each other.

I The diameter of the cam 83 is made of such length as'to bring wheel 82 of bent arm 9 into contact with cam 83, on shaft 31, when wheel 28 gets out of contact with cam wheel 30 and as in this-latter moment arm 24 dropsand the thread 65 of stamp 64 begins to 'cut the thread intothc pin rotated on blockv 63, it stands to reason, as long as said wheel 82 rotates on cam 83 and all i points of the periphery of same are 'equ'idis tant from its center, and furthermore set crew 81 is in contact with the platform 80,

' that thethread cut into thepinis allalong of the greatest uniformity, V l the periphery of cam 83 for a part of its circumference is interrupted by a depression 84c, naturally the thread 6,5may'sinlr slightly deeper and produce a thread of shaped ends of spring 10 almost to 'cometogether. pin has the desired length and the pin must then be removed to make room for the next one. a I

The removal of the pin is cause-d by the effect of four different actions, two of same going on simultaneously. The first of these I four actions is the liftingof stamp 64 with the thread 65 off the-pin by cam wheel 30, lifting arm 24, and the other simultaneous, similar action is the lifting of arm 15, and thereby also ofstamp 20, off lead screw 20, by means of a projection E26" indicated in dotted lines on shaft 26, said projection pressing ,arrn' 15,-upwardly in the'moment when arm 24 is lifted by cam-wheel 30.

These two'simultaneous actions allow spring 10, of powerful construction, to push shaft 6 back to its original location after edge guidewheel 35 has shortly before pushed lever 43 to the outside thereby taking rod 50 along. i

The withdrawalof rod 50 is so timed that 7 shown) from w As, however, I

In this moment the thread of the] there is no longer any pressure on the finished-pin'so as to allow the finishedpinjtobe'j thrownjout of chuck 9 and block 62'whenspring 10 presses shaft 6 backto its'original position, the finished pin drops into "an inclined guideway 79 into a receiver (not treatment. 7 Y A It is understood that many changescan be madein the construction of the machine as described and the ascendingland descending of the stampcan be arranged in various here it is taken forfurther wayswithout departing from the -princi-ple or spirit of myinvention; likewise "also the reciprocating oft-he shaft holding the'chu'ck can be broughtabout in different ways, but 7 any such changejwhich in its result isthe same as that brought aboutby the present invention will be claimed as coming Within the scope of the appended claims. I What I claim'is:

'1'. In a thread cutting machine adapted to i press a chasing cutter into the goods to be treated, the combination comprising means; regulating the depth to which the chasing cutter is to be pressed, said regulating means consisting of a rotary shaft, a cam of large and another cam of smaller diameter arranged on saidshaft, a pivotally arranged bent arm holding a chasing cutter and hav- 1ng at its free end awheel engaging afore said cam of large diameter, a set screw arguide-wheel and having aplatform co-operatively dlspose'd below and with aforesaid set screw;

' ranged in aforesaid arm, and a pivotallyarranged bent arm having at its free end a" V 2., In a thread cutting machine adapted to press a chasing cutter upon the goods to be treated, the combination comprising means regulating the depth to which the chasing? cutter is to be pressed, said regulating means consisting of' a pivotally arranged and pe a riodically ascending and descending lever" arm, having its free end form an inverted V with a fork-shaped t-ern'iinal, a guidewheel arranged in said terminal, a set screw arranged in the lever arm, a chasing cutter I vertically adjustably arrangedin aforesaid lever between its pivot and aforesaid screw, a pivotally arranged bent arm, having a;

fork-shaped' end, co-operatively disposed below and engaging aforesaid set screw v av guide-wheel arra-ngedin the fork-shaped end of said bent arm, and a cam with a curved-in periphery engaging the guide-wheel of said bent arm.

In testimony whereof, I have signed my name to this specification 'May"12tl1, 1923.

' FREDERICK WV; HESSMER. 

